RUDIMENTARY VOCAL SACS 589 In his teeth Man differs by the small exaggeration of the c B A / pl. pi. Flo. 284.—The hard palate, A, of a Caucasian; B, of a ITegro ; G, of an adult Orang- Utan, showing the differences in shape of the bones. The pnLite of the Negro represents a type transitional between that of the Caucasian and thnt of the Orang, w:f, Maxilla ; pl, palatine ; jj.mx, preznaxilla. (From "Wiedershehu's Structure of Man.) canines, which hardly, if at all, differ in the two sexes, There is also a complete absence of a diastema. The teeth are also on the whole weaker than in the Anthropoids, though Hylobates is very human in this particular. There is a tendency in Man towards the disappearance of the upper outer incisors, and more markedly still of the wisdom teeth, which appear very late, and are often imperfect. In a large number of eases the tooth does not appear at all. In the larynx there is 110 great development of the great throat pouches of the Anthropoids. The minute diverticula of that organ, known to human anatomists as the ventricles of Morgagni, alone remain to testify to a former howl- L 285.—Human Larynx in frontal section, cr, Cricokl cartilage; sn, sinus of Morgagni ; t.c, first trachea! cartilage ; th> thyroid cartilage. (From Wiedersheim's Structure of Man.) ing apparatus in the ancestors of Man.